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Table 1 Characteristics of the five trials included in meta-analysis

From: Different body mass index grade on the risk of developing glioma: a meta-analysis

Author

Year

Design

Country

Male

Female

Median follow-up (months)

Median age (years)

NOS

Benson [10]

2008

Cohort study

UK

/

646

74.4

57 ± 4.5

******

Siegel [11]

2013

Case-control study

USA

506

347

12.4

57 ± 13.3

******

Wiedmann [8]

2013

Cohort study

Norway

83

65

282

48.1 (20–101)

******

Michaud [14]

2011

Cohort study

Cross-countrya

167

173

100.8

/

*******

Jones [13]

2010

Cohort study

USA

832

427

40

58

******

Moore [12]

2009

Cohort study

USA

341

139

98.4

/

******

  1. (aDenmark, France, Germany, Greece, Italy, the Netherlands, Norway, Spain, Sweden, and the United Kingdom)